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Beware of the single rank x16 RAM kits sneaked in some laptop models! The 1Rx16 modules have significantly lower bandwidth compared to the 1Rx8 variants - NotebookCheck.net News
Solved: what is the diffrence between these Rams? can i mix 1R and2R - Dell Community
Lot of 6 Kingston 4GB ECC Unbuffered RAM 1Rx8 PC3-12800E+2Rx8 PC3-10600E-Tested | eBay
2012 iMac Memory Upgrade, which memory? w/Pic | MacRumors Forums
698656-H01 HP 4GB SODIMM Laptop Memory
Single vs Dual Rank DD4. What is the performance difference between running 4x(GB) 1Rx8 vs 2x(GB) 2Rx8, given all other variables are equal? - Quora
2GB 1Rx8 DDR3 SODIMM PC3-10600 1333MHz 204-Pin Non-ECC Unbuffered CL9 1.5V Laptop Memory Module EBJ20UF8BCS0-DJ-F Compatible Replacement Spare Part for Elpida Compatible and Other Systems at Amazon.com
Samsung 4GB RAM / 4 X 1GB / 1rx8 PC3-10600U I - Etsy